Propagation Channel
It is a physical medium that carries the modulated signal. it is s the medium through which the signal travels. It can be air, water, or any other medium that allows the signal to propagate.
Structure of Wireless Communication Link
The Structure of a wireless communication link involves several key components that work together and maintains the connection between the transmitter and the receiver. Every component plays an important role in the proper transmission of data from the transmitter to the receiver. The following block diagram demonstrates the complete structure of the wireless communication link.
Basic Elements of Wireless Communication
Structure of Wireless Communication
Transmitter Side
- Information Source: It is a device that contains the information, or we can say it produces information and that information must be processed before transmitting through the propagation channel.
- Source Encoder: It is a device that compresses the data provided by the information source in order to reduce the amount of data to be transmitted by removing the redundancies in the data.
- Channel Coder: It is a device that is used to increase the reliability of the system by adding the redundant bit (parity bit) to the codded message to protect against errors that may occur during the transmission.
- Modulator: It is a device that converts the codded message into a signal so that it can be transmitted through the communication channel. It converts digital data into analog signals.
- Multiplexer: It is a device that allows multiple signals to share a single transmission line by combining them to a single composite signal.